FILE PHOTO: Prompts on how to use Amazon’s Alexa personal

    FILE PHOTO: Prompts on how to use Amazon’s Alexa personal assistant are seen as a wifi-equipped Roomba begins cleaning a room in an Amazon ‘experience center’ in Vallejo, California, U.S., May 8, 2018. Picture taken on May 8, 2018. REUTERS/Elijah Nouvelage/File Photo